code: def paint(self):
      self.setupGLState()
  
      painter = QtGui.QPainter(self.view())
      self.draw(painter)
      painter.end()
  
file_path: pyqtgraph/pyqtgraph/examples/GLPainterItem.py
imports: import OpenGL.GL
  import pyqtgraph
  from pyqtgraph.opengl import GLAxisItem, GLGraphicsItem, GLGridItem, GLViewWidget
  from pyqtgraph.Qt import QtCore, QtGui
label_desc: Use image node_id 3 for calling the GLPainterItem obj's underlying member method code with example usage: obj.paint() without return types